+\newcommand{\ctyp}[1]{\texttt{#1}} % C standard type
+
+\newcommand{\headfile}[1]{%
+%\index{file!include!{#1}@{{\tt {#1}}}}\texttt{#1}%
+\texttt{#1}%
+} % header file name
+
+\newcommand{\procfile}[1]{%
+\index{file!filesystem~\texttt{/proc}!{#1}@{{\tt {#1}}}}\texttt{#1}%
+%\index{#1@{{\tt {#1}} (direttiva)}}\texttt{#1}%
+} % /proc file name
+\newcommand{\sysfile}[1]{%
+\index{file!di~sistema!{#1}@{{\tt {#1}}}}\texttt{#1}%
+%\index{#1@{{\tt {#1}} (direttiva)}}\texttt{#1}%
+} % system file name
+\newcommand{\conffile}[1]{%
+\index{file!di~configurazione!{#1}@{{\tt {#1}}}}\texttt{#1}%
+%\index{#1@{{\tt {#1}} (direttiva)}}\texttt{#1}%
+} % configuration file name
+\newcommand{\procrelfile}[2]{%
+\index{file!filesystem~\texttt{/proc}!{#1/#2}@{{\tt {#1/#2}}}}\texttt{#2}%
+%\index{#1@{{\tt {#1}} (direttiva)}}\texttt{#1}%
+}
+
+\newcommand{\sysctlfile}[1]{%
+\index{file!file di controllo (sotto \texttt{/proc/sys})!{#1}@{{\tt {#1}}}}\texttt{/proc/sys/#1}%
+%\index{#1@{{\tt {#1}} (direttiva)}}\texttt{#1}%
+} % /proc/sys file name
+
+\newcommand{\sysctlrelfile}[2]{%
+\index{file!file di controllo (sotto \texttt{/proc/sys})!{#1/#2}@{{\tt {#1/#2}}}}\texttt{#2}%
+%\index{#1@{{\tt {#1}} (direttiva)}}\texttt{#1}%
+} % /proc/sys file name
+
+
+\newcommand{\kstruct}[1]{%
+\index{struttura dati del kernel!{#1}@{{\tt {#1}}}}\texttt{#1}%
+%\index{#1@{{\tt {#1}} (struttura dati)}}\texttt{#1}%
+} % struttura dati
+\newcommand{\kstructd}[1]{%
+\index{struttura dati del kernel!{#1}@{{\tt {#1}}}!definizione di}\texttt{#1}%
+%\index{#1@{{\tt {#1}} (struttura dati)}!definizione di}\texttt{#1}%
+} % struttura dati
+\newcommand{\type}[1]{%
+\index{tipo di dato!{#1}@{{\tt {#1}}}}\texttt{#1}%
+%\index{#1@{{\tt {#1}} (tipo)}}\texttt{#1}%
+} % system type
+\newcommand{\struct}[1]{%
+\index{struttura dati!{#1}@{{\tt {#1}}}}\texttt{#1}%
+%\index{#1@{{\tt {#1}} (struttura dati)}}\texttt{#1}%
+} % struttura dati
+\newcommand{\structd}[1]{%
+\index{struttura dati!{#1}@{{\tt {#1}}}!definizione di}\texttt{#1}%
+%\index{#1@{{\tt {#1}} (struttura dati)}!definizione di}\texttt{#1}%
+} % struttura dati